Exercise price per share or per unit of warrants or rights outstanding.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(i)(4))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

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- Definition

Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(29))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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Credit Facilities (Deerfield Warrants) (Details) - $ / shares	Dec. 31, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Common stock issued (in shares)	18,190,054	10,387,926
Conversion features under term loan facility
Debt Instrument [Line Items]
Common stock issued (in shares)	647,001
2018 Deerfield Warrants
Debt Instrument [Line Items]
Common stock issued (in shares)	875,001
Previous Exercise Price \| Conversion features under term loan facility
Debt Instrument [Line Items]
Exercise price (usd per share)	$ 92.3
Previous Exercise Price \| 2018 Deerfield Warrants
Debt Instrument [Line Items]
Exercise price (usd per share)	47.1
Amended Exercise price \| Conversion features under term loan facility
Debt Instrument [Line Items]
Exercise price (usd per share)	6.61
Amended Exercise price \| 2018 Deerfield Warrants
Debt Instrument [Line Items]
Exercise price (usd per share)	$ 6.61